66692825 has 24 divisors (see below), whose sum is σ = 85083096. Its totient is φ = 51840000.

The previous prime is 66692789. The next prime is 66692851. The reversal of 66692825 is 52829666.

It can be written as a sum of positive squares in 12 ways, for example, as 32024281 + 34668544 = 5659^2 + 5888^2 .

It is not a de Polignac number, because 66692825 - 2⁶ = 66692761 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 153809 + ... + 154241.

It is an arithmetic number, because the mean of its divisors is an integer number (3545129).

Almost surely, 2^66692825 is an apocalyptic number.

It is an amenable number.

66692825 is a deficient number, since it is larger than the sum of its proper divisors (18390271).

66692825 is a wasteful number, since it uses less digits than its factorization.

66692825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605 (or 600 counting only the distinct ones).

The product of its digits is 311040, while the sum is 44.

The square root of 66692825 is about 8166.5675164049. The cubic root of 66692825 is about 405.5331595258.

The spelling of 66692825 in words is "sixty-six million, six hundred ninety-two thousand, eight hundred twenty-five".